ive palyed around with the low speed needle a lot and finally found the sweet spot, but still wont do wheelies unless i hit a little bump. Its sounds great and screams when i accelerate, but for some reason it wont do a wheelie. Could it be b/c I have the battery pack in the middle of the car instead of back. I wouldnt think that would make much of a difference. I think i am going to swap teh 2.5 with the os 18tm. I hear that gives a lot of power!!!!!